lab/2016/router/simple-router.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>router</title>
</head>
<body>
    <ul> 
        <li><a href="#/">turn white</a></li> 
        <li><a href="#/blue">turn blue</a></li> 
        <li><a href="#/green">turn green</a></li> 
    </ul> 
<script>
    function Router() {
        this.routes = {};
        this.currentUrl = '';
    }
    Router.prototype.route = function(path, callback) {
        this.routes[path] = callback || function(){};
    };
    Router.prototype.refresh = function() {
        this.currentUrl = location.hash.slice(1) || '/';
        this.routes[this.currentUrl]();
    };
    Router.prototype.init = function() {
        window.addEventListener('load', this.refresh.bind(this), false);
        window.addEventListener('hashchange', this.refresh.bind(this), false);
    }
    window.Router = new Router();
    window.Router.init();

    var content = document.querySelector('body');
    // change Page anything
    function changeBgColor(color) {
        content.style.backgroundColor = color;
    }

    Router.route('/', function() {
        changeBgColor('white');
    });
    Router.route('/blue', function() {
        changeBgColor('blue');
    });
    Router.route('/green', function() {
        changeBgColor('green');
    });
</script>
</body>
</html>